Trolley shoe



R. J. LYLE TROLLEY SHOE May 1926.

Filed May 23, 1925 @merma/1gb,

sesv

Patented May 74,1926."d

f i l a resident of the village. of Kinmount, in'

the county of Victoria, in the Province of Ontario, Canada, have invented 'certain new anduseful Improvements in Trolley Shoes, of which vthe following is the specification.-

Myinvention relates to improvementsv in trolley shoes, and the object of the inven-v tion-is to devise a shoe which will havel a plurality of wearing surfaces which maybe used successively as a sliding contact, thereby providing ashoe which will have a maximum life, which inV each contactv position will be selfadjusting to thev forward and reverse movement and throughwhich the vcurrent path of travel to the harp 'is equal in all positions, and it consists essentially of the arrangement -andconstruction of partsk as, hereinafter more particularly lexplained.v t j a Y Fig. 1 is .a side elevation of my trolley shoe mounted upon a harp and shownv in the position ofl forward travel as indicated by arrow. .v

Fig. 2 is a similar view to Figure 1 showingV the shoe in position of rearward travel.

Fig. 3 is a sectional view through myY shoe showing it mounted in the arms 'ofthe trol-y ley harp.

In the drawings likecharacters of refer-k ence indicate corresponding parts in each- Vprovided with a surrounding'groove 2 equal ,y

in depth at allr points. .Y

3 is a hub connected by spokes l4 to the annular shoe 1. VThe hub 3 is provided with a central orifice 5. j Y 6 is a trolley harp provided with arms7 and 8, each provided with an orifice 9.

10 is an axle pin extending through the orifices 9V of the arms and 5 of the shoe and held in place by cotter pins 11.

y 12 is a spring contact secured to each arm of the harp 6 and bearing against the end of the hub 3 around theaxle pin 10 as clear'- lyxindicated in Figure 3.

By this means current conduction between the shoe vand harp is provided for. Y v

*13 are projections extending from the trolley shoe andA arranged circumferentially f harp.

therearound a e each spoke 4 and the annular shoe 1.

14 isa rib extending inward fromfeach arm 7' of the trolleyharp in the movement of the projections 13.. y Whenthe shoe lis mounted upon the harp in operative position, the ribs 14 prov qiilal: spaced distances apart,y preferably atfa point of junction between` path of l oo jectv inward between lany one pair of vprol Y jections 13 at each sideof thev shoe.' When `the shoe is'travelling inthe forward direction as indicated byvv arrow in Figure 1one ofthe projections 13 indicated by the numeral ,13X iscarrie'd against the rib mil` 14 so asto engage the lower side thereof as clearly indicated in Figure l, therebyhold" Y ing the shoe from rotary movement during its forward travel so that the periphery of i dicated at 15. When the travel,l of theshoe the shoe formed by the `baseof thefgroove 2 j has sliding contact with thek trolley'wireinclearly indicated in Figure 2, AThe shoe during this movement revolving aroundthe pin 10 into the new position, the Shoebeing then held stationary andqhaving` sliding y contact with-the trolley -wire 15 as above described.

When desiredthey shoe may be dismounted from the harp and replaced sol that theribs 14 arelocated between any one of the otherv pairs of projections 13x and.13, thereby providing a new wearing surface forming sliding contact between-the. shoe `and the trolley wire.

. From this description it will'be seen that I have devised a trolley shoe which will vhave a maximum number Ofwearing con-j ytact Surfaces which may be used successively yall positions will provide anefiicient 'current conduction between the shoe andthe Y What 'I claim as my invention lis:

10:5KV N` ofan annular shoeprovidedvwith a'peripho 1 upon the trolley wire 15` is reversed, one I5 73,1 I

- eral surrounding ,groove adapted to receive trolley shoe whenin sliding Contact withthe trolley wire. y p ,A

2. The combination with a trolley harp, of Aan annular shoe provided with ya peripheral surrounding groove adapted to receive a trolley wire, and means adapted to hold the shoe in a pluralityv of stationary positions or both forward and reverse movement as the direction' of the trolley lshoe is reversed. y f 7 .Y 3. The combination with a trolley harp, of 'aI circular trolley Shoe turnaloly mounted in the harp, stop meansextending from the shoe, and stationary stop means carried by the harp to Contact with the stop means on the .shoe either during forward or reverse movement.

ROBERT JOHN LYLE, 

